How to post a sales invoice with commission?

Hi all,

We are finding a way to record the commission value in NAV 2009. Can NAV post the commission to G/L by setting the salesperson code (in sales header)? There is a commission rate field in the sales person card, but we seems not found the commission G/L Account no. field in the card. If there is no way to post the commission, we could only add one additional commission line to the sales line item (with negative amount) to record and post the commistion to G/L.

Kindly help!

As far as I know, there is no functionality around that Commission%-field at all.
It is only used in standard report 115 (Salesperson - Commission).